CCTV Camera Suppliers & Dealers in Delhi IGI Airport, Aerocity, Gurgaon & Noida

1.      What is CCTV ?
2.      Which type of Security Camera should I use ?
3.      Is it difficult to install CCTV ?

1.     What is CCTV

Most people think that CCTV is a relatively new invention, but then again, many don’t even know what it is … so first things first, what exactly is Closed Circuit Television? Well the television bit is perhaps self explanatory; it’s simply about putting a picture onto a television screen, or ‘video monitor’ to give it its correct title. Incidentally, very basic video monitors are essentially televisions, but without the additional circuitry needed, to receive and decode the Radio Frequency signals, which are transmitted through the air.

The ‘Closed Circuit’ bit is actually quite straightforward. Let’s say for example, that you subscribe to Satellite TV. If you watch your favourite television programme, you and perhaps a few million others will be able to receive the transmitted signal through the dish and ‘set top box’. As anyone with a correctly tuned ‘Telly’ can access this signal, we can safely describe this type of arrangement as an ‘Open Circuit Television’ or ‘OCTV’ system.;If a signal is being linked from any source, whether it’s a DVD player, a camcorder, or a surveillance camera, directly to a display device such as a television, this is described as a ‘Closed Circuit’ simply because it is not available to anyone else.
So you can see that in the early days of developing video camera security systems, the pictures from the cameras were almost always sent to a monitor, or a video recorder, or indeed a sealed Control Room under ‘Closed Circuit’ conditions, hence the now widely accepted term “Closed Circuit Television”.
2.     Which type of Security Camera should I use?


Bullet style security cameras are the most popular. They can be used inside or out. These security cameras come in black and white or color and come with all of the required mounting hardware. Some security camera casings are weather resistant and don’t require added external protection. Most security cameras have a fixed 6mm lens that allows you to see facial features out to about 30 feet and provides a 56 degree angle of view.



Dome Cameras

Infra Red Cameras
An infrared security camera has infrared LED lighting installed around the outside of the lens of the camera. This lighting allows the camera to capture a good image in no light at all.
Infrared security cameras will provide a colour picture while the light is good. When it gets dark, the camera will switch to infrared mode and illuminate it’s built-in infrared LEDs. In infrared mode the image is captured in black and white.
Bullet Cameras


C-Mount Cameras
The advantage to a c-mount camera is that the lens can be changed. If you need to see further than 35 or 40 ft then you’ll need a c-mount camera with a special lens. C-Mount lenses are available from 4mm to 50mm. A 4mm lens provides facial detail and a 70 degree angle of view focused up to about 35 ft.